how do i shrink my iphone homescreen?

[Myranda]

i was messing around with the phone pad and everything zoomed in and now its just messed up and i dont know what to do,

 

[Skinbad]

I would imagine it is a 3GS since the 3GS is the only iPhone that can do this unless it is jailbroken.To turn it back,tap your screen twice with 3 fingers together.When it zooms out,go to settings,general,accessibility,zoom and turn the zoom option off.